Swivel-jar socket



P. ARBON.

' SWIVEL JAR SOCKET.

APPLICATION. 11.50 APR. 21.1919.

Patented Feb. 24, 1920.

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li' ipl'ia'tibii'flleil'lpril 21,1919. "Serial No. 2913580.

Total whomtrendy "concern."

Be it known that'I, PatrnAnnoivyresiding at Tulsa, in the county o'fTuIsa'and State of "Oklahoma," at 'subj'ec't' 'of the King of Great Britain,"- have "invented or discovered certain new and "useful Improvements in Swivel-Jar Sockets, of which improvements 1 in Fig. 5.

the following' is; a specification.

In drilling wells it is necessary to-"turn the bit so that a truly "cylindrical-"bore may be formed. When employing "ropeformed of vegetable fiber's," it is necessary for the driller to turn or twist the portion of the rope above the well in order to rotate the" bit. lVhen using" the wire rope for lifting the tool it has been found that the" weight of'the tools, usually some two'or three thou-' sandpounds, will cause an untwisting ofthe strands of the'rope and 'consequentrotation of the tools and that as soon as the rope is relieved of the weight of the 'tools,ji. 0., when the latter strike the bottorrrof the well, the

rope being connected to'the tools by a swivel joint will'retwist or'fret'urn' to normal, condition. When the tools areagain lifted there will occur the same 'untwisting of the rope I and rotation of the tools." and when the downward movement of the tools is arrested, the rope will retwis't. o

Experiencehas 'shwn that the extent, of twisting difi'ers nit-rear less frorn'the untwistiiig andhencethe bit will be angularlyshifted at each strokej 'aiid hence the turning ofthe rope by the driller "is not always neces- It sometimes occurs 'when employing swivel jar sockets,.of the -type shown] and described in "LettersPatent Nol 1,045883 granted December 3rd, 1912, to Paul Arbon,

assignee of J E. Prosser, that the movement and especially the rotation of the swivel or jar will be prevented or greatly retarded by fine sand working in between the swivel or jar and the inner wall of the socket. The object of the invention described herein is to so space the swivel or jar from the inner wall of the socket as to avoid a clogging of the swivel and as it is desirable that the socket and swivel should be in axial alineinent, it is a further object of the invention to provide the maintenance of such axial alinement between the spaced jar and socket. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figure 1 is a sectiona]: elevation of a swivel jar ;;socket e mbodying :my improvements"; FigsLZ'and 3 are a transversesectionson (planes; indicated by the lines II'II and TIL-III, Fig. 1; Figs. 4 and 5 are views similarto Fig.- 1 illustrating certain modifications and Fig. 6 is a side elevation'of the jar or piston shown The ilnproveddevice consists of a body portion l'havinga central "bore or passage 2-extending from the lower-end of the body portion and an extension 3 having a bore or opening 4: of less idiameter than that in the lower portion of the body. The smaller bore extends down into the" body andconnects with the large borer At the juncture of these bores isi-formed a shoulder or abutment '5 to receive the impact'of the swiveling jar or piston 6. It is desirablefor reasons stated in the'patent referred to that the jar and socket shouldbe. in axial alinement and hence heretofore it has been the custom .to make the jar with 'an external diameter. approximately equal to the diameter of the larger bore. It has been found" however, that as before stated, fine sand,'""etc;, will work in between the jar and'socket and prevent a free rotation or' swiveling of-the jar.

In order to avoid this cloggingof the jar or swivelby finesand,-the latter is made with "an external diameter substantially smaller than the internal diameter of the larger borean'd'jin order to maintain the j ar and socket in artial alinement' during oneration, suitable means are employed for that purpose"; As "for example, in theconstruction shown 'in Figbl 'a plurality of balls 7 are-soarmn ed ina groove "or iracei'v-ay 8 formed in 'the'inner wall of the socket; as to rmect' a distance less than one-half the diameter into the bore and bear against the periphery of the jar or swivel. The balls are inserted into thev raceway through a radial opening which is closed after the balls have been placed in position by a threaded plug '9. In addition to maintaining the axial alinenien't of the jar and socket. these balls will facilitate therotation of the jar and swivel and the return of the rope to normal condition when the jar or swivel is released from the weight of the socket and tools carried thereby.

In lieu of the construction shown in Fig. 1, the rotating members or bodies may be carried by the jar or piston a shown in Fig. 4: When employing rollers, one or more raceways 10 may be formedinfone of the parts or members, as for example, in the swivel or jar 6 as shown in Fig. 4, the upper and lower walls of the raceway being undercut, as at 11, for the reception of the conical ends of the rollers 12. In order to permit of the placing of the rollers in the raceway, an internally threaded notch 13 is formed in the outer wall of one of the undercut end walls. This construction permits of one end of the rollers to be inserted into the groove or undercut 11 and the opposite ends moved laterally through the notch 13 into the other roove orundercut. After the rollers have. been placed in the raceway, the notch is.

closed by a threaded plug 14.

The axial alinement of the jar or swivel with the socket'may be attained by forming narrow collars 15 on the jar preferably adjacent to the ends of the latter as. shown in Figs. 5 and 6. When using the latter construction, the collars may be transversely slotted or notched, as shown at 16 in Fig.

" 6, to permit of the escape of water, etc

from between the jar and socket during the movement of the j ar.

For shipment and occasionally other purposes, it is desirable to prevent any rotation of the jar or swivel in the socket, and hence provision is made for locking the jar'to the socket. Any suitable means may be employed for that purpose, such forexample as that shown which consistsin forming one or more openings through the socket in such position relativev to the bore that a portion of the pins 16 when passed through these openings will project into a groove or grooves formed on the surface of the jars,

as clearly shown in Figs. 1 to 4 inclusive. In

the wall of the bore for maintaining the jar in axialalinement with the body portion.

2. A swivel jar socket having in combina tion a body portion having an axial bore and provided with means for engaging the drilling tools, a shoulder or abutment extendin into the bore, a j ar or piston adapted to be connected to. a rope arranged in the bore in the body portion and having a diameter substantially less than the diameter of the bore and'a plurality of rotating bodies carried by one of said parts or elements and bearing against the other part or element to maintain the jar and bodv portion in'axial alinement 3. A swivel jar socket having in combination a body portion having an axialbore and provided with means for engaging the drilling tools. a shoulder or abutment extending into the bore, a jar or piston adapted to be connected to a rope-arranged in the bore in the body portion and having a di ameter substantially less than the diameter of the bore, and a plurality of rotating bodies carried by the jarv or pistonand adapted tobear against the inner wall of the body portion. I g

4. A swivel jar socket having in com bination a. body portion provided with means lntegraltherew th for engaging drlllmg tools and having an axial bore or opening, 'a shoulder or abutment ex tending into the bore, a ar or pmton having ,a diameter substantially less thanthe diameter of the bore and arranged within the bore and adapted to be rotated and reciprocated therein and to be connected to'a rope, means interposed. between the jar and the wall of the bore in which the jar operates for maintaining the jar in axial alinement with the body portion and means for looking the jar as against movement in the socket.

In testimony whereof, I have hereunto set my hand. r

'. v PA UL ARBON. 

